Documentation/devicetree/bindings/phy/mediatek,mt7988-xfi-tphy.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/phy/mediatek,mt7988-xfi-tphy.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MediaTek MT7988 XFI T-PHY

maintainers:
  - Daniel Golle <daniel@makrotopia.org>

description:
  The MediaTek XFI SerDes T-PHY provides the physical SerDes lanes
  used by the (10G/5G) USXGMII PCS and (1G/2.5G) LynxI PCS found in
  MediaTek's 10G-capabale MT7988 SoC.
  In MediaTek's SDK sources, this unit is referred to as "pextp".

properties:
  compatible:
    const: mediatek,mt7988-xfi-tphy

  reg:
    maxItems: 1

  clocks:
    items:
      - description: XFI PHY clock
      - description: XFI register clock

  clock-names:
    items:
      - const: xfipll
      - const: topxtal

  resets:
    items:
      - description: Reset controller corresponding to the phy instance.

  mediatek,usxgmii-performance-errata:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      One instance of the T-PHY on MT7988 suffers from a performance
      problem in 10GBase-R mode which needs a work-around in the driver.
      This flag enables a work-around adjusting an analog phy setting and
      is required for XFI Port0 of the MT7988 SoC to be in compliance with
      the SFP specification.

  "#phy-cells":
    const: 0

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - resets
  - "#phy-cells"

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/mediatek,mt7988-clk.h>
    soc {
      #address-cells = <2>;
      #size-cells = <2>;

      phy@11f20000 {
        compatible = "mediatek,mt7988-xfi-tphy";
        reg = <0 0x11f20000 0 0x10000>;
        clocks = <&xfi_pll CLK_XFIPLL_PLL_EN>,
                 <&topckgen CLK_TOP_XFI_PHY_0_XTAL_SEL>;
        clock-names = "xfipll", "topxtal";
        resets = <&watchdog 14>;
        mediatek,usxgmii-performance-errata;
        #phy-cells = <0>;
      };
    };

...